The International journal of prosthodontics最新文献

{"title":"Effects of Surface Treatments and Mouth Rinses on the Roughness and Color Stability of Interim Restorations Produced Through Additive Manufacturing.","authors":"Ekin Gazioglu, Deger Ongul","doi":"10.11607/ijp.9303","DOIUrl":"10.11607/ijp.9303","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate how the surface treatments and mouth rinses of interim restorations affect staining, surface roughness, and the role of polishing on staining.</p><p><strong>Materials and methods: </strong>A total of 320 disk-shaped specimens were produced from four resin materials (n = 80) using conventional and additive methods. Each group was divided into two groups (n = 40) according to surface applications: conventional polishing (C) and surface sealant covering (S). After measuring surface roughness, groups were divided into four subgroups (n = 10) and immersed in mouth rinses: Listerine (LIS), chlorhexidine gluconate 0.2% (Klorhex; CHX), chlorhexidine gluconate 0.1% (Eludril; ELU), and artificial saliva (AS). Specimens were stored for 1 day (T1) and 7 days (T2) in these solutions. Color measurements were performed before and after storage using a spectrophotometer, and color differences were calculated via the CIELab system. Post assessment, specimens were polished, and ΔE values were remeasured. Data were statistically analyzed with one-way ANOVA and Bonferroni tests (α = .05).</p><p><strong>Results: </strong>The highest surface roughness values were observed in the PMMA, and the lowest were in printed groups among the conventional and sealant groups (P < .05). LIS had the highest ΔE values against all mouth rinses. The sealant groups showed the lowest ΔE values and surface roughness at all time points. The process of polishing reduced ΔE values in all tested groups.</p><p><strong>Conclusions: </strong>Printed resins have sufficient optical and surface properties for interim restorations. Long-term use of mouth rinses may cause discoloration, but surface sealants and polishing may reduce this discoloration.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"516-524"},"PeriodicalIF":1.8,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143702627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the Mechanical Properties and Fracture Surfaces of Interim Restorative Materials Produced by Different 3D-Printer Technologies: An In Vitro Study.","authors":"Mehmet Ünal, Ebru Sürer, Yurdanur Ucar, Esma Başak Gül Aygün","doi":"10.11607/ijp.9206","DOIUrl":"10.11607/ijp.9206","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the mechanical properties of interim restorative materials produced using stereolithography (SLA), digital light processing (DLP), and liquid crystal display (LCD) technologies with specimens produced by milling and conventionally manufactured polymethyl methacrylate (PMMA).</p><p><strong>Materials and methods: </strong>Six different 3D printers-two brands for each of SLA (Formlabs [FL] and DWS Systems [DWS]), DLP (Asiga [AS] and Mega [MG]), and LCD (Vega [VG] and Photon [PH]) technologies-were used as experimental groups, and milling (Tempo-Cad, Ondent) and conventional (autopolymerizing PMMA, Imident, Imicryl) methods were used as controls. According to International Standards Organization (ISO) 10477:2004, 120 rectangular prism interim resin specimens with dimensions of 25 × 2 × 2 mm were prepared. The manufactured specimens were subjected to three-point bending and microhardness tests, and Weibull analysis was performed. Fracture surface analysis was performed using SEM (FEI Quanta 650). Statistical data analysis was performed with one-way ANOVA and post hoc Dunnett T3 test (α = .05).</p><p><strong>Results: </strong>The mean flexural strength value of the milling group was statistically significantly higher than all other groups (P < .05) except the FL group (P = 1.000). The mean elastic modulus values of DWS, FL, AS, VG, and conventional groups were not statistically significantly different from the milling group. All 3D-printer groups except PH showed a statistically significantly higher microhardness value than the conventional group.</p><p><strong>Conclusions: </strong>All the interim resin materials produced with six different 3D printers constituted a good alternative to the conventional method. However, only resin material produced with FL showed similar mechanical properties to the milling method.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"544-555"},"PeriodicalIF":1.8,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144692908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparing Four Maxillomandibular Relation Recording Methods for Virtual Adjustment of All-Ceramic Restorations: An Experimental Comparative Study.","authors":"Pingping Song, Baijin Zeng, Minbo Fan, Dan Meng","doi":"10.11607/ijp.9480","DOIUrl":"10.11607/ijp.9480","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the effectiveness of four maxillomandibular relation recording methods for guiding the virtual adjustment of all-ceramic restorations.</p><p><strong>Materials and methods: </strong>A total of 12 participants underwent buccal maxillomandibular relation recording using traditional methods (Control group), 3Shape TRIOS 3 dynamic scans (SD group), Zebris mandibular motion trajectories (ZT group), and Zebris articulator parameters (ZP group). Virtual adjustments were performed for four restoration types: single anterior/ posterior crowns, two posterior crowns, and three-unit fixed bridge. 3D occlusal surface deviations between the natural teeth and restorations were measured.</p><p><strong>Results: </strong>All three digital maxillomandibular relation recording methods met clinical requirements. The Zebris trajectory group demonstrated significantly smaller 3D deviations compared to the 3Shape dynamic scan group (P < .05), exhibiting superior performance in eliminating occlusal interferences of restorations. Notably, the Zebris trajectory group showed significantly reduced 3D deviations only in the single anterior tooth subgroup compared to the Zebris articulator parameter group (P < .05), indicating better efficacy in removing restorative occlusal interferences.</p><p><strong>Conclusions: </strong>The three digital techniques matched or exceeded traditional methods in eliminating occlusal interferences, with the Zebris mandibular motion trajectory recording technique demonstrating superiority over the 3Shape dynamic recording method.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"483-496"},"PeriodicalIF":1.8,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145575108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical Validation of an Occlusal Force-Based Implant Surgical Guide System: Enhanced Accuracy in Edentulous Patient Treatment with Negligible Positional Deviation.","authors":"Sangjin Suh, Sichan Park, Heechul Kim, Chan Park","doi":"10.11607/ijp.9360","DOIUrl":"10.11607/ijp.9360","url":null,"abstract":"<p><p>A method for designing a three-piece surgical guide that incorporates patient-specific occlusal forces when fabricating digital implant surgical guides for patients with complete edentulism is proposed. This approach allows more precise vertical implant placement by incorporating the natural occlusal forces of patients into guide seating. Clinical validation of this system demonstrated improved positional accuracy compared to conventional guided surgery methods, particularly in the critical aspect of vertical positioning. This innovative approach effectively addresses the fundamental challenge of achieving precise implant placement in patients with edentulism, yielding highly predictable surgical outcomes.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"471-476"},"PeriodicalIF":1.8,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficiency of Diamond Rotary Instruments in Cutting Through Zirconia and Lithium Disilicate Restorations.","authors":"Taiseer A Sulaiman, Tariq A Alsahafi, Aous A Abdulmajeed, Mostafa Sulaiman, Abdulhaq A Suliman","doi":"10.11607/ijp.9341","DOIUrl":"10.11607/ijp.9341","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the impact of diamond rotary instrument grit size and rotational speed on cutting efficiency through lithium disilicate and zirconia ceramic materials.</p><p><strong>Materials and methods: </strong>Rectangularshaped specimens measuring 12.5 × 14.5 mm and 2 mm thick-40 lithium disilicate (IPS e.max, Ivoclar) and 40 4 mol% yttria zirconia (Katana STML, Noritake)-were milled and sintered according to the manufacturer's instructions. Two diamond rotary instruments (X-tra coarse [230-μm grit size] and fine [46-μm grit size]; Komet USA) were used to cut into the ceramic materials at 200,000 and 50,000 revolutions per minute (RPM) under a continuous water cooling rate of 50 mL/minute (n = 10/grit/speed). Handpiece movement was controlled, torque was maintained at 3.4 Ncm, and pressure was maintained at 2 N using a load sensor. The efficiency of each rotary instrument was calculated. Scanning electron microscopy (SEM) images were made of each rotary instrument to visualize wear and deterioration. Data were analyzed statistically (α = .05).</p><p><strong>Results: </strong>Ceramic material cutting efficiency differed among diamond rotary instruments (P < .001). A coarse diamond rotary instrument at 200,000 RPM cut both ceramics efficiently (P < .001) for zirconia and lithium disilicate specimens; cutting efficiency was 0.064 and 0.107 mm/second, respectively. Only coarse diamond rotary instruments can cut 10 mm in 10 minutes. High speed led to more efficient cutting regardless of ceramic material or rotary instrument grit (P < .001). SEM images show higher wear and degradation at 200,000 RPM than at 50,000 RPM for both grit diamond rotary instruments.</p><p><strong>Conclusions: </strong>Coarse-grit diamond rotary instruments cut zirconia and lithium disilicate ceramics more efficiently than fine-grit ones. High-speed cutting at 200,000 RPM cuts ceramics more efficiently than a lower speed at 50,000 RPM.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"525-532"},"PeriodicalIF":1.8,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144103470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stress Distribution of Soft Tissue Mucosa of the Alveolar Ridge upon Dislocation of BPS Dentures: A 3D Finite Element Analysis.","authors":"Sheng Fang, Kailun Chen, Xiaohan Lin, Zhu Tie, Ziqin Lin, Junjie Lin, Rui He, Botao Wang","doi":"10.11607/ijp.9312","DOIUrl":"10.11607/ijp.9312","url":null,"abstract":"<p><strong>Purpose: </strong>To analyze the stress distribution and displacement of alveolar ridge mucosal tissue when biofunctional prosthetic system (BPS) dentures were dislocated under three conditions.</p><p><strong>Materials and methods: </strong>CBCT was used to obtain the data of the patient's jaw, and the patient's BPS scan data was gained through the oral scanner. Through Mimics (Materialise), Geomagic Studio, and Siemens NX software, the CT data files were built into 3D finite element models (FEM) of the maxillary and mandibular edentulous jaws, mucosa, and BPS complete dentures to then analyze the stress distribution and mucosal tissue displacement caused by ridge mucosal tissue when BPS dentures were dislocated under three conditions: BPS denture dislocation along the anterior alveolar ridge, BPS denture dislocation caused by the left posterior teeth biting hard food, and BPS denture dislocation caused by the anterior teeth biting hard food.</p><p><strong>Results: </strong>In general, under the three different circumstances, the value of the maxillary and mandibular equivalent stress was similar for a relatively large area of the oral cavity, but the deformation value of the mandibular mucosa was significantly higher than that of the maxillary mucosa.</p><p><strong>Conclusions: </strong>When a BPS complete denture is dislocated, the stress distribution of the mucosa under the base of the maxillary and mandibular dentures is uniform and extensive, and the stress distribution of the palatal mucosa is small. Compared to the dislocation of BPS dentures that were removed and worn independently, the mucosal stress distribution was more uneven when BPS dentures were subjected to biting hard food, resulting in greater deformation.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"501-508"},"PeriodicalIF":1.8,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Novel Assessment Workflow of Implant Accuracy by Means of Stackable Guides: A Case Series.","authors":"Mario Beretta, Matteo Pellegrini, Mattia Manfredini, Alberto Pispero, Franco Sanseverino, Carlo Maiorana, Pier Paolo Poli","doi":"10.11607/ijp.9306","DOIUrl":"10.11607/ijp.9306","url":null,"abstract":"<p><strong>Purpose: </strong>To assess the accuracy of one-piece implant placement using stackable surgical guides by means of a novel stent defined as a number guide screwed onto the fixed base template to improve the intrasurgical registration of the scan bodies.</p><p><strong>Materials and methods: </strong>A digital workflow was used for one-piece implant planning and placement. Participants were selected based on specific criteria, and stackable guides were used for fully guided implant placement with immediate provisional loading. The accuracy of implant placement was assessed by comparing pre- and post-intervention data registered with the aid of the number guide.</p><p><strong>Results: </strong>A total of 10 participants were treated with 47 one-piece implants placed in the maxilla and mandible. All implants achieved adequate primary stability, allowing immediate loading. Accuracy was measured by linear and angular deviations, showing greater precision in the mandible. Implant characteristics yielded statistically significant differences in terms of accuracy.</p><p><strong>Conclusions: </strong>A fully guided digital workflow ensured precise implant placement and immediate provisional loading. The additional use of the number guide allowed effective accuracy assessments of the system in terms of linear and angular deviations, highlighting its potential to assess postoperative implant placement.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"556-568"},"PeriodicalIF":1.8,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145076951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Systematic Review and Meta-analysis Evaluating the Survival, Failure, and Complication Rates of Metal-Ceramic, Veneered, and Monolithic All-Ceramic Tooth-Supported Multiple-Unit Fixed Dental Prostheses (FDPs)-Part 2.","authors":"Pierluigi Romandini, Bjarni E Pjetursson, Joao Pitta, Alissa Balet, Reo Ikumi, Irena Sailer","doi":"10.11607/ijp.9666","DOIUrl":"10.11607/ijp.9666","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the 5-year survival of metal-ceramic and all-ceramic tooth-supported fixed dental prostheses (FDPs) and assess biologic and technical complication rates.</p><p><strong>Materials and methods: </strong>Randomized clinical trials and prospective studies on tooth-supported FDPs with a mean follow-up of ≥ 3 years were included. A systematic search of MEDLINE (PubMed), Embase, and Cochrane CENTRAL (January 2014 to December 2024) identified relevant studies. An additional 17 studies from prior systematic reviews were included to cover earlier periods. Survival and complication rates were estimated using robust Poisson regression models to generate pooled 5-year survival estimates.</p><p><strong>Results: </strong>In total, 41 studies, including 600 metal-ceramic and 1,532 all-ceramic FDPs, met the inclusion criteria. The 5-year survival rates were 92.9% for veneered densely sintered zirconia, 91.3% for metal-ceramic, 88.4% for glass-infiltrated alumina, 87.9% for monolithic densely sintered zirconia, and 82.5% for lithium disilicate-reinforced glass-ceramic FDPs. Lithium disilicate FDPs showed significantly lower survival than metal-ceramic restorations, while differences among other materials were not statistically significant. Overall, 71.0% of restorations remained complicationfree after 5 years. All-ceramic FDPs had higher rates of marginal caries and loss of retention than metalceramic FDPs. Framework fractures were more prevalent in all-ceramic restorations, particularly in lithium disilicate-reinforced glass-ceramic and glass-infiltrated alumina FDPs (> 10% over 5 years). Ceramic chipping was common but least frequent in monolithic zirconia FDPs.</p><p><strong>Conclusions: </strong>Veneered and monolithic densely sintered zirconia and metal-ceramic FDPs demonstrate comparable 5-year survival rates. High fracture rates make weaker ceramics unsuitable for multiunit restorations. Monolithic zirconia offers improved resistance to chipping and framework fractures.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"444-462"},"PeriodicalIF":1.8,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146133952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The 2026 International Association for Dental Research (IADR) Prosthodontic Awards.","authors":"Stephen F Rosenstiel","doi":"10.11607/ijp.2026.4.eao","DOIUrl":"https://doi.org/10.11607/ijp.2026.4.eao","url":null,"abstract":"","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"39 4","pages":"441-443"},"PeriodicalIF":1.8,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148690619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of Metal-Ceramic Bond Strength in Co-Cr Alloys Produced by Selective Laser Melting at Different Laser Powers.","authors":"Betul Karahasan, Derya Ozdemir Dogan, Nazim Babacan","doi":"10.11607/ijp.9332","DOIUrl":"10.11607/ijp.9332","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the effects of laser power on the relative density, surface roughness, and metal-ceramic bond strength of cobalt-chromium (Co-Cr) alloys produced by selective laser melting (SLM) following a single laser track analysis to determine suitable processing parameter window.</p><p><strong>Materials and methods: </strong>Single track laser melting was performed at various laser powers and scanning speeds using SLM. Subsequently, three different laser powers (240, 300, 360 W) were used to produce 12 × 12 × 10-mm cube specimens and 25 × 3 × 0.5-mm metal strips. The density of the cube specimens (n = 5) was determined using the Archimedes method. Microstructural investigations were conducted after metallographic preparation using a scanning electron microscope (SEM). Surface roughness of the airborne particle-abraded metal strip specimens (n = 9) was measured. Ceramic was applied to the metal specimens (n = 10) in each group, and the strength of the metal-ceramic bond was evaluated through a three-point bend test.</p><p><strong>Results: </strong>SEM analysis showed improved laser track clarity, width, and continuity with increasing laser power from 240 to 360 W. Relative density exceeded 99% for all specimens, with no significant group differences (P = .90). Higher laser power caused keyhole formation and increased surface roughness (Sa), peaking at 11.89 ± 3.86 μm for the P360 group (P < .01). Specimens produced with the highest laser power demonstrated stronger and more consistent metal-ceramic bond strengths, with significant differences observed between the highest (360 W) and the lowest (240 W) power groups (P < .001).</p><p><strong>Conclusions: </strong>While increased laser power enhanced surface roughness and strength of the metal-ceramic bond, it did not lead to substantial changes in the relative density of the specimens.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"509-515"},"PeriodicalIF":1.8,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144692910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}